Your pictures are really nice (they remind me of a 60's calendar)
You could easily be on the 7 day list and probably be on the 90 without too much work.
Getting on the 7 day list is not that hard but may take some luck.
A few suggestions:
1) Post bigger pictures, your pictures are really detailed and you are shortchanging the picture by posting at such a low resolution.
2) Take a little time to share what/where/when and how in the header for the group. This is a photo group so people really want to know some details.
3) Advertise, Ask for votes both on the picture and advertise in the come see my pictures group. Also create a new folder and put your best pictures in it. Creating a new group gets you the most visitors.
4) Give people something that they would want. Example for your pictures give people a monthly calendar with your pictures in the central focus.
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Final words don't get too enamoured by the 7 day list we have seen pictures get on with less than 10 votes.
I have been on PBase for 3 months now and have been on the 7day (I was even #1 for a few days) multiple times and on the 90 day list a few times.
My trick #1, #2 and most of all I post scantily clad ladies (always good for some cheap votes
). I've never solicited for votes. I mainly made this account to share with friends and allow the models to pick up pictures.
Oh and don't forget to do a Google search on your account name you may miss your 24hrs of fame otherwise.